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117991 — KEY,WOODRUFF

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

117991: KEY,WOODRUFF.

The KEY,WOODRUFF is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 360 OVERALL, nut_style: CLINCH, nut_height: 0.281 INCHES NOMINAL IN, pilot_width: 0.087 INCHES MINIMUM AND 0.092 INCHES MAXIMUM IN, pilot_length: 0.093 INCHES NOMINAL IN, thread_class: 2B. This part is cataloged in the U.S.

Government catalog under NSN 5315-00-616-5532, 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
117991
NSN: 5315-00-616-5532
NIINs: 006165532, 007080474
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 21450 — ARMY WEAPONS COMMAND ATTN AMSWE-REE-S (USA)
SPECIFICATIONS
materialCOPPER ALLOY 360 OVERALL
nut_styleCLINCH
nut_height0.281 INCHES NOMINAL IN
pilot_width0.087 INCHES MINIMUM AND 0.092 INCHES MAXIMUM IN
pilot_length0.093 INCHES NOMINAL IN
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
thread_directionRIGHT-HAND
width_across_flats0.187 INCHES NOMINAL IN
nominal_thread_size0.086 INCHES IN
thread_quantity_per_inch56
distance_from_centerline_to_flat0.093 INCHES NOMINAL IN
NSN5315-00-616-5532
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 117991 · 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
•
HARDNESS RATING: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
•
STARTING EDGE SHAPE: STRAIGHT
•
STYLE DESIGNATOR: ROUND BOTTOM
•
CIRCLE DIAMETER: 1.240 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN
•
KEY HEIGHT: 0.542 INCHES MINIMUM AND 0.547 INCHES MAXIMUM IN
•
KEY SIZE DESIGNATION: WOODRUFF D
•
MATERIAL: STEEL COMP 2330 OR STEEL COMP 4130 OR STEEL COMP 8630 OVERALL
•
THICKNESS: 0.3125 INCHES MINIMUM AND 0.3135 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
HARDNESS RATING40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
STARTING EDGE SHAPESTRAIGHT
STYLE DESIGNATORROUND BOTTOM
CIRCLE DIAMETER1.240 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN
KEY HEIGHT0.542 INCHES MINIMUM AND 0.547 INCHES MAXIMUM IN
KEY SIZE DESIGNATIONWOODRUFF D
MATERIALSTEEL COMP 2330 OR STEEL COMP 4130 OR STEEL COMP 8630 OVERALL
THICKNESS0.3125 INCHES MINIMUM AND 0.3135 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 5
X1625Reference document
Same NSN cross-reference
Reference document — Secondary reference
MS35756-23Reference document
Same NSN cross-reference
Reference document — Secondary reference
4P150Reference document
Same NSN cross-reference
Reference document — Secondary reference
74189SReference document
Same NSN cross-reference
Reference document — Secondary reference
10X41010Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 117991?
117991 is a KEY,WOODRUFF.
What parts can replace 117991?
There are 5 known substitutes for 117991: X1625, MS35756-23, 4P150 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 117991?
117991 is cataloged in the U.S. Government catalog under NSN 5315-00-616-5532. 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.