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G1981-5-10 — NUT ASSEMBLY,SELF-LOCKING,GANG C

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

G1981-5-10: NUT ASSEMBLY,SELF-LOCKING,GANG C.

NUT ASSEMBLY,SELF-LOCKING,GANG C. Key specifications include nut_spacing: 1.250 INCHES NOMINAL IN, nut_quantity: 57, thread_class: 3B, channel_style: STRAIGHT TYPE, overall_width: 0.609 INCHES MAXIMUM IN, thread_series: UNF. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-902-3898, 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
G1981-5-10
NSN: 5310-00-902-3898
FSC: 5310 — Nuts and Washers
CAGE: 15653 — HOWMET GLOBAL FASTENING SYSTEMS INC (USA)
SPECIFICATIONS
nut_spacing1.250 INCHES NOMINAL IN
nut_quantity57
thread_class3B
channel_styleSTRAIGHT TYPE
overall_width0.609 INCHES MAXIMUM IN
thread_seriesUNF
channel_height0.203 INCHES NOMINAL IN
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
features_providedFLOATING NUT
surface_treatmentCADMIUM AND CHROMATE NUT
nominal_thread_size0.312 INCHES IN
NSN5310-00-902-3898
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: G1981-5-10 · 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
•
THREAD SERIES: UNF
•
NUT QUANTITY: 57
•
FEATURES PROVIDED: FLOATING NUT
•
CHANNEL HEIGHT: 0.203 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.312 INCHES IN
•
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN
TECHNICAL CHARACTERISTICS
THREAD SERIESUNF
NUT QUANTITY57
OVERALL WIDTH0.609 INCHES MAXIMUM IN
FEATURES PROVIDEDFLOATING NUT
CHANNEL HEIGHT0.203 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.312 INCHES IN
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
ASSEMBLY OVERALL HEIGHT0.328 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM AND CHROMATE NUT
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 G1981-5-10?
G1981-5-10 is a NUT ASSEMBLY,SELF-LOCKING,GANG C.
What is the NSN for G1981-5-10?
G1981-5-10 is cataloged in the U.S. Government catalog under NSN 5310-00-902-3898. 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.