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All Trucks›Peterbilt Model 387›Bolt Tightness
Peterbilt Model 387 · torque

Bolt TightnessEvery fastener worth a torque wrench, in foot-pounds and newton-metres. Wheel nuts and tire pressures are in here too.

Read the notes, not just the number

A dry bolt and an oiled bolt need different torque to clamp the same. Thread condition, plating and whether the fastener is reusable all change the answer, so the notes column matters as much as the figure.

Pick your truck's year and the table hides everything that does not apply to it.

Fastener table 51 rows · 50 sourced

What you are tighteningSizeft-lbN·mYearsSource
Oil pan drain plug (MX-13)New copper sealing washer.12 mm Allen44602010–2018Unconfirmed
Oil pan drain fitting (Cummins ISX)Pre-EPA2017 ISX value.M27 x 241562006–2017Verified
Wheel nut, hub-piloted 10-hole 285.75 mmOiled stud threads and nut flange. Star pattern. Re-torque after first 50-100 miles.M22 x 1.5450-500610-6782000–2026Verified
Wheel nut, hub-pilotedOiled.M20 x 1.5280-330380-4472000–2026Verified
Wheel nut, hub-piloted (light duty)Oiled.M14 x 2.0150-160203-2172000–2026Verified
Wheel nut, stud-piloted standardDry. Studs and nuts free of rust and debris.3/4-16450-500610-6781990–2026Verified
Wheel nut, stud-piloted standardDry.1-1/8-16450-500610-6781990–2026Verified
Wheel nut, stud-piloted heavy dutyDry. Heavy-duty radius.15/16-12750-9001017-12201990–2026Verified
Air brake chamber mounting nutsAlternate top and bottom, bring up in steps. Use the new hardware supplied with the chamber.M16133 +/- 7180 +/- 102008–2026Verified
Air brake chamber clamp bandAlternate top and bottom for even clamping.-20-25282005–2026Verified
Service push rod clevis jam nutPush rod should protrude no more than two threads into the clevis throat.-45-5061-682005–2026Verified
Air disc brake caliper to anchor plate (axial)Six bolts. Bendix recommends new bolts each time. Do not reuse.M16Pre-torque 20-60, final 375Pre 27-81, final 5082010–2026Verified
Spring U-bolt high nutFour stages: hand-tight, 60 ft-lb, 200 ft-lb, then final. Diagonal pattern.5/8-18 UNF180-230245-3132010–2026Verified
Spring U-bolt high nutSame four-stage sequence. If the nut turns on a second application the U-bolt is stretching and must be replaced.3/4-16 UNF270-330367-4492010–2026Verified
Spring U-bolt high nutFour-stage sequence.7/8-14 UNF420-500569-6802010–2026Verified
Spring U-bolt high nutFour-stage sequence.1-14 UNF520-600705-8162010–2026Verified
Wheel bearing inner adjusting nut (conventional hub)200 ft-lb while rotating, back off one turn, re-torque 50 ft-lb rotating, then back off per axle table. End play 0.001-0.005 in.TMC RP618200 then 50271 then 682019–2026Verified
PreSet Plus spindle nut, steer hubDo NOT back off. Engage the retaining ring through the aligned hole.-3004072020–2026Verified
PreSet Plus spindle nut, drive or trailer hubDo NOT back off. Verify the hub turns freely by hand.-5006782020–2026Verified
PreSet two-piece spindle nut (inner / outer)No back-off on either nut.-300 inner / 200 outer407 / 2712019–2026Verified
Hub cap boltsStar pattern. New gasket every time.-12-1816-242019–2026Verified
Drive stud installation (into hub)Stud installation torque, not wheel nut torque.3/4-1670-9095-1222019–2026Verified
Air spring upper mounting nutHendrickson suspension bulletin.3/4-161001352015–2026Verified
Air spring lower mounting nut-1/2-1333452015–2026Verified
Upper shock absorber mount boltTorque only at specified ride height.3/4-102363202015–2026Verified
Upper shock absorber mount boltGrade 8 version of the same location.3/4-103174302015–2026Verified
Lower shock absorber mount bolt-3/4-102363202015–2026Verified
Lower shock tower bolt-1/2-131111502015–2026Verified
Height control valve mounting nut-1/4-207102015–2026Verified
Air disc brake caliper to torque plate27 mm socket.M18 x 2.5 x 552803802015–2026Verified
Hub cap screw-M8 x 1.25 x 2015202015–2026Verified
Hub filler port-3/8-18 NPTF22302015–2026Verified
QUIK-ALIGN torque rod pivot boltSuspension-maker pivot bolt. Re-check axle alignment after.7/8 UNC x 105908002015–2026Verified
Pedestal mount bolt-3/8-1644602015–2026Verified
Slack adjuster clevis jam nutPush rod must not protrude more than 0.125 in through the clevis.1/2-2020-3027-412005–2026Verified
Brake chamber mounting nut (5/8-11 version)Older/lighter chamber hardware.5/8-111111502005–2026Verified
Bent-bolt exhaust clamp under 3 in--25342010–2026Verified
Bent-bolt exhaust clamp 3 in and up, tube to tube--35482010–2026Verified
Bent-bolt exhaust clamp 3 in and up, tube to casting--50682010–2026Verified
V-band exhaust clampTighten alternately until the V-groove is about half closed.-Pre-torque 50, max 7068-952010–2026Verified
Muffler body band clamp--9-1212-162010–2026Verified
Driveshaft end yoke nutMeritor published value. A torque multiplier is usually needed. Replace the nut, never reuse.-6008142000–2026Verified
Driveshaft bearing strap boltsMeritor published range. New straps and bolts every time; torque in sequence.-30-4041-542000–2026Verified
U-joint U-bolt nut, 1350 / 1410 seriesSpicer kit 3-94-18X. Do not reuse U-bolts.3/8-2420-2427-322000–2026Verified
U-joint U-bolt nut, 1480 / 1550 (SPL55 / SPL70)Spicer kit 3-94-28X.3/8-2432-3743-502000–2026Verified
U-joint bearing strap bolt, 1710 / 1760 / 1810Spicer. Bearings straps are single-use.6.5-70-18X115-135156-1832000–2026Verified
U-joint cap and bolt, 1650 / 1850 seriesSpicer cap-and-bolt style joints.5-70-18X / 8-70-18X77-103 / 110-147104-140 / 149-1992000–2026Verified
U-joint spring tab bolt (SPL140 / 170 / 250)Spicer kit 211941X.M8 x 1.0028382000–2026Verified
Driveshaft midship nut, SPL55Two-piece shaft centre nut. Under-torque here separates the driveline.1-5/16 in head400-450542-6102000–2026Verified
Driveshaft midship nut, SPL70 / SPL90-1-5/8 in head475-525644-7122000–2026Verified
Differential pinion yoke nut (Dana)Varies by axle model - check the axle tag before setting the wrench.M36 x 1.5 / M42 x 1.5575-703 / 840-1020780-953 / 1139-13832000–2026Verified

Wheel nuts carry a re-check: 50-100 miles after any wheel goes on, then every 10,000 miles, in a star pattern, finishing with a calibrated wrench. Rows reading Not verified were not published anywhere we could reach — that is deliberate.

Tire pressure — Michelin load-and-inflation table, 275/80R22.5 Load Range G (pounds per axle)

Cold pressure (psi)707580859095100105110
Single tire, pounds per axle9,0009,4509,88010,31010,74011,02011,56011,96012,350
Dual tires, pounds per axle16,38017,20018,16018,76019,54020,28021,04021,76022,700

Source: Michelin Truck Tire Service Manual 2023

How to set pressure without guessing

TorqueLibrary — A research compilation, not an OEM manual. Green means published and traceable; amber means second-hand, so check it. Where nothing was published the page says so rather than guessing.
Built from OEM operator manuals, federal service bulletins and industry standards (SAE, TMC, Bendix, Michelin, ConMet, Accuride). Confirm every number against the manual for your specific VIN before you turn a wrench.