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Technical Data Sheet
PartsTable / COMPONENT / 12691-21
12691-21 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The STEM FUEL INJECTION NOZZLE is a the manufacturer industrial component. Key specifications include length: 0.438 INCHES NOMINAL SQUARE END IN, material: STEEL COMP 4140 BLADE, body_width: 1.625 INCHES MAXIMUM IN, face_width: 1.750 INCHES NOMINAL IN, body_height: 1.750 INCHES MAXIMUM IN, body_length: 2.000 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-01-116-6342, 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
12691-21
NSN: 5306-01-116-6342
FSC: 5306
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
length0.438 INCHES NOMINAL SQUARE END IN
materialSTEEL COMP 4140 BLADE
body_width1.625 INCHES MAXIMUM IN
face_width1.750 INCHES NOMINAL IN
body_height1.750 INCHES MAXIMUM IN
body_length2.000 INCHES MAXIMUM IN
design_formSPOKED
design_typeFIXED
load_rating2000.000 POUNDS MAXIMUM LBS
end_positionCONNECTION END AT RIGHT ANGLE TO PLANE OF HOOK END
groove_shapeU
rating_methodELECTRICAL SINGLE COMPONENT SINGLE WINDING
NSN5306-01-116-6342
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 12691-21 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
A-505-12691-21Interchangeable
interchangeable cross-reference
interchangeable
12691Interchangeable
interchangeable cross-reference
interchangeable
22100-5Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12691-21?
12691-21 is a STEM FUEL INJECTION NOZZLE.
What parts can replace 12691-21?
There are 3 known substitutes for 12691-21: A-505-12691-21, 12691, 22100-5. Substitute compatibility should be verified for your specific system.
What is the NSN for 12691-21?
12691-21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-01-116-6342. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026