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12-900-3 — SHUNT,INSTRUMENT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

12-900-3: SHUNT,INSTRUMENT.

The SHUNT,INSTRUMENT is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, recess_depth: 0.354 INCHES NOMINAL IN, hole_diameter: 4.647 INCHES NOMINAL IN, overall_width: 1.625 INCHES NOMINAL IN, overall_height: 1.250 INCHES NOMINAL IN, overall_length: 2.000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-738-8935, 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
12-900-3
NSN: 5310-00-738-8935
NIINs: 007388935, 010343268, 012423331
FSC: 5310 — Nuts and Washers
CAGE: 27068 — DCP SPRING ACQUISITION COMPANY, INC. DBA NEW ENGLAND SPRING DIV NEW ENGLAND SPRING (USA)
SPECIFICATIONS
materialSTEEL OVERALL
recess_depth0.354 INCHES NOMINAL IN
hole_diameter4.647 INCHES NOMINAL IN
overall_width1.625 INCHES NOMINAL IN
overall_height1.250 INCHES NOMINAL IN
overall_length2.000 INCHES NOMINAL IN
mounting_methodTHREADED STUD(S)
outside_diameter5.316 INCHES NOMINAL IN
special_featuresMOUNTING FACILITY THREAD SIZE AND SERIES/TYPE DESIGNATOR: NF1/4-28
style_designatorRECESSED
terminal_locationCENTER
material_thickness0.042 INCHES NOMINAL IN
NSN5310-00-738-8935
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 12-900-3 · 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
•
STYLE DESIGNATOR: RECESSED
•
OUTSIDE DIAMETER: 5.316 INCHES NOMINAL IN
•
RECESS DEPTH: 0.354 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.042 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
HOLE DIAMETER: 4.647 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.394 INCHES NOMINAL IN
STYLE DESIGNATORRECESSED
OUTSIDE DIAMETER5.316 INCHES NOMINAL IN
RECESS DEPTH0.354 INCHES NOMINAL IN
MATERIAL THICKNESS0.042 INCHES NOMINAL IN
SPECIAL FEATURESFOUR EQUALLY SPACED INTERNAL PREBENT KEYS,0.401 IN. WIDE 0.250 IN. LONG IN
MATERIALSTEEL OVERALL
HOLE DIAMETER4.647 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 1
429003Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 12-900-3?
12-900-3 is a SHUNT,INSTRUMENT.
What parts can replace 12-900-3?
There is 1 known substitute for 12-900-3: 429003. Substitute compatibility should be verified for your specific system.
What is the NSN for 12-900-3?
12-900-3 is cataloged in the U.S. Government catalog under NSN 5310-00-738-8935. 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.