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279674 — CHAMBER ASSEMBLY,AI

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

279674: CHAMBER ASSEMBLY,AI.

The CHAMBER ASSEMBLY,AI is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: SINGLE BALL SEAT, HEXAGON, nut_height: 0.870 INCHES MINIMUM AND 0.890 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNF, ball_seat_radius: 0.870 INCHES MINIMUM AND 0.890 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-705-1968, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
279674
NSN: 5310-00-705-1968
NIINs: 007051968, 008688066
FSC: 5310 — Nuts and Washers
CAGE: 7X677 — GENERAL MOTORS LLC DBA GENERAL MOTORS LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleSINGLE BALL SEAT, HEXAGON
nut_height0.870 INCHES MINIMUM AND 0.890 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNF
ball_seat_radius0.870 INCHES MINIMUM AND 0.890 INCHES MAXIMUM IN
thread_directionLEFT-HAND
features_providedCASEHARDENED
surface_treatmentCADMIUM OR ZINC OVERALL
width_across_flats1.481 INCHES MINIMUM AND 1.495 INCHES MAXIMUM IN
nominal_thread_size0.750 INCHES IN
thread_quantity_per_inch16
NSN5310-00-705-1968
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 279674 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
WIDTH ACROSS FLATS: 1.481 INCHES MINIMUM AND 1.495 INCHES MAXIMUM IN
•
THREAD SERIES: UNF
•
FEATURES PROVIDED: CASEHARDENED
•
THREAD DIRECTION: LEFT-HAND
•
NOMINAL THREAD SIZE: 0.750 INCHES IN
•
NUT HEIGHT: 0.870 INCHES MINIMUM AND 0.890 INCHES MAXIMUM IN
•
BALL SEAT RADIUS: 0.870 INCHES MINIMUM AND 0.890 INCHES MAXIMUM IN
•
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS1.481 INCHES MINIMUM AND 1.495 INCHES MAXIMUM IN
THREAD SERIESUNF
FEATURES PROVIDEDCASEHARDENED
THREAD DIRECTIONLEFT-HAND
NOMINAL THREAD SIZE0.750 INCHES IN
NUT HEIGHT0.870 INCHES MINIMUM AND 0.890 INCHES MAXIMUM IN
BALL SEAT RADIUS0.870 INCHES MINIMUM AND 0.890 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
NUT STYLESINGLE BALL SEAT, HEXAGON
THREAD CLASS2B
SUBSTITUTES & CROSS-REFERENCES 1
3729738Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 279674?
279674 is a CHAMBER ASSEMBLY,AI.
What parts can replace 279674?
There is 1 known substitute for 279674: 3729738. Substitute compatibility should be verified for your specific system.
What is the NSN for 279674?
279674 is cataloged in the U.S. Government catalog under NSN 5310-00-705-1968. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.