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121983 — PARTS KIT,FUEL INJECTION NOZZLE

✓ Government record, cited
Hama · NUT WASHER
PRODUCT OVERVIEW

121983: PARTS KIT,FUEL INJECTION NOZZLE.

PARTS KIT,FUEL INJECTION NOZZLE. Key specifications include nonsupply_items_and_quantities: NUT,ADJUSTING 1,TIP 1,FILTER ELEMENT 1. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-012-1983, 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
121983
NSN: 5310-00-012-1983
NIINs: 000121983, 007993489
FSC: 5310 — Nuts and Washers
CAGE: 24617 — GENERAL MOTORS CORP (USA)
SPECIFICATIONS
component_quantity3
nonsupply_items_and_quantitiesNUT,ADJUSTING 1,TIP 1,FILTER ELEMENT 1
NSN5310-00-012-1983
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 121983 · Hama ⚠ 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: 0.8610 INCHES MINIMUM AND 0.8750 INCHES MAXIMUM IN
•
THREAD SERIES: UNF
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.562 INCHES IN
•
NONDEFINITIVE SPEC/STD DATA: A TYPE
•
NUT HEIGHT: 0.473 INCHES MINIMUM AND 0.496 INCHES MAXIMUM IN
•
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
•
NUT STYLE: HEXAGON
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.8610 INCHES MINIMUM AND 0.8750 INCHES MAXIMUM IN
THREAD SERIESUNF
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.562 INCHES IN
NONDEFINITIVE SPEC/STD DATAA TYPE
NUT HEIGHT0.473 INCHES MINIMUM AND 0.496 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
NUT STYLEHEXAGON
THREAD CLASS3B
THREAD QUANTITY PER INCH18
SUBSTITUTES & CROSS-REFERENCES 1
FFB571TYPEAReference document
Same NSN cross-reference
Reference document — Identification reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 121983?
121983 is a PARTS KIT,FUEL INJECTION NOZZLE manufactured by Hama.
What parts can replace 121983?
There is 1 known substitute for 121983: FFB571TYPEA. Substitute compatibility should be verified for your specific system.
What is the NSN for 121983?
121983 is cataloged in the U.S. Government catalog under NSN 5310-00-012-1983. 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.