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12999 — SPRING ASSEMBLY,LEAF

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

12999: SPRING ASSEMBLY,LEAF.

The SPRING ASSEMBLY,LEAF is a the manufacturer industrial component. Key specifications include special_features: 50 CALIBER RIFLE, part_name_assigned_by_controlling_agency: RIFLE MUZZLE BRAKE. This part is cataloged in the U.S.

Government catalog under NSN 2510-00-287-5694, 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
12999
NSN: 2510-00-287-5694
NIINs: 002875694, 003407597, 012383122, 013232707, 017333087
FSC: 2510 — Vehicular Cab, Body, and Frame Structural Components
CAGE: 82347 — MARMON GROUP INC THE FENESTRA DIV /MICHIGAN (USA)
SPECIFICATIONS
special_features50 CALIBER RIFLE
part_name_assigned_by_controlling_agencyRIFLE MUZZLE BRAKE
NSN2510-00-287-5694
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SPRING ASSEMBLY,LEAF TITLE COMPONENT PN 12999 MFR SPRING ASSEMBLY,LEAF
KEY FEATURES
•
TENSION PLATE QUANTITY: 2
•
DESIGN TYPE: MAINSPRING
•
SPRING DEFLECTION RATE: 1034.000 POUNDS PER INCH NOMINAL LBS
•
SPRING LENGTH UNDER LOAD: 46.250 INCHES NOMINAL IN
•
ELLIPTIC SHAPE: SEMI
•
REBOUND CLIP QUANTITY: 4
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
TENSION PLATE QUANTITY2
DESIGN TYPEMAINSPRING
SPRING DEFLECTION RATE1034.000 POUNDS PER INCH NOMINAL LBS
SPRING LENGTH UNDER LOAD46.250 INCHES NOMINAL IN
ELLIPTIC SHAPESEMI
REBOUND CLIP QUANTITY4
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
7971339Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 12999?
12999 is a SPRING ASSEMBLY,LEAF.
What parts can replace 12999?
There is 1 known substitute for 12999: 7971339. Substitute compatibility should be verified for your specific system.
What is the NSN for 12999?
12999 is cataloged in the U.S. Government catalog under NSN 2510-00-287-5694. 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.