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907-6704221RHH40 — NUT,PLAIN,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

907-6704221RHH40: NUT,PLAIN,HEXAGON.

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY OVERALL, nut_style: HEXAGON, nut_height: 0.380 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UN, hardness_rating: 125.0 ROCKWELL C NOMINAL. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-372-5234, 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
907-6704221RHH40
NSN: 5310-01-372-5234
FSC: 5310 — Nuts and Washers
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
nut_styleHEXAGON
nut_height0.380 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
thread_class2B
thread_seriesUN
hardness_rating125.0 ROCKWELL C NOMINAL
thread_directionRIGHT-HAND
width_across_flats6.125 INCHES NOMINAL IN
nominal_thread_size5.750 INCHES IN
bearing_surface_typeCHAMFERED OR WASHER FACED
nut_counterbore_depth0.120 INCHES NOMINAL FIRST END IN
thread_quantity_per_inch12
NSN5310-01-372-5234
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 907-6704221RHH40 · 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
•
WIDTH ACROSS FLATS: 6.125 INCHES NOMINAL IN
•
THREAD SERIES: UN
•
HARDNESS RATING: 125.0 ROCKWELL C NOMINAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281 CLASS A FORM 1 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NUT COUNTERBORE DEPTH: 0.120 INCHES NOMINAL FIRST END IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 5.750 INCHES IN
•
NUT HEIGHT: 0.380 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS6.125 INCHES NOMINAL IN
THREAD SERIESUN
HARDNESS RATING125.0 ROCKWELL C NOMINAL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281 CLASS A FORM 1 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NUT COUNTERBORE DEPTH0.120 INCHES NOMINAL FIRST END IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE5.750 INCHES IN
NUT HEIGHT0.380 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
NUT STYLEHEXAGON
THREAD CLASS2B
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 1
907-6704221FINDRHH40Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 907-6704221RHH40?
907-6704221RHH40 is a NUT,PLAIN,HEXAGON.
What parts can replace 907-6704221RHH40?
There is 1 known substitute for 907-6704221RHH40: 907-6704221FINDRHH40. Substitute compatibility should be verified for your specific system.
What is the NSN for 907-6704221RHH40?
907-6704221RHH40 is cataloged in the U.S. Government catalog under NSN 5310-01-372-5234. 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.