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266697R1 — PIN,GROOVED,HEADED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

266697R1: PIN,GROOVED,HEADED.

The PIN,GROOVED,HEADED is a the manufacturer industrial component. Key specifications include height: 0.094 INCHES NOMINAL IN, diameter: 0.309 INCHES MINIMUM AND 0.311 INCHES MAXIMUM IN, material: STEEL COMP 1015 OVERALL, head_style: PAN NO. 2 (R1 NOT REQUIRED IN ITEM DESCRIPTION), undercut_width: 0.043 INCHES MINIMUM AND 0.049 INCHES MAXIMUM IN, first_end_style: CHAMFERED.

This part is cataloged in the U.S. Government catalog under NSN 5315-00-276-4356, 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
266697R1
NSN: 5315-00-276-4356
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 31007 — NAVISTAR INTERNATIONAL CORPORATION DBA NAVISTAR (USA)
SPECIFICATIONS
height0.094 INCHES NOMINAL IN
diameter0.309 INCHES MINIMUM AND 0.311 INCHES MAXIMUM IN
materialSTEEL COMP 1015 OVERALL
head_stylePAN NO. 2 (R1 NOT REQUIRED IN ITEM DESCRIPTION)
undercut_width0.043 INCHES MINIMUM AND 0.049 INCHES MAXIMUM IN
first_end_styleCHAMFERED
effective_length0.642 INCHES NOMINAL IN
style_designatorGROOVE
pin_head_diameter0.438 INCHES NOMINAL IN
under_head_length0.781 INCHES NOMINAL IN
undercut_diameter0.242 INCHES NOMINAL IN
first_end_taper_angle30.0 DEGREES NOMINAL
NSN5315-00-276-4356
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 266697R1 · 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
•
UNDERCUT WIDTH: 0.043 INCHES MINIMUM AND 0.049 INCHES MAXIMUM IN
•
FIRST END TAPER LENGTH: 0.031 INCHES NOMINAL IN
•
UNDERCUT DIAMETER: 0.242 INCHES NOMINAL IN
•
UNDER HEAD LENGTH: 0.781 INCHES NOMINAL IN
•
FIRST END STYLE: CHAMFERED
•
STYLE DESIGNATOR: GROOVE
•
PIN HEAD DIAMETER: 0.438 INCHES NOMINAL IN
•
DIAMETER: 0.309 INCHES MINIMUM AND 0.311 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
UNDERCUT WIDTH0.043 INCHES MINIMUM AND 0.049 INCHES MAXIMUM IN
FIRST END TAPER LENGTH0.031 INCHES NOMINAL IN
UNDERCUT DIAMETER0.242 INCHES NOMINAL IN
UNDER HEAD LENGTH0.781 INCHES NOMINAL IN
FIRST END STYLECHAMFERED
STYLE DESIGNATORGROOVE
PIN HEAD DIAMETER0.438 INCHES NOMINAL IN
DIAMETER0.309 INCHES MINIMUM AND 0.311 INCHES MAXIMUM IN
FIRST END TAPER ANGLE30.0 DEGREES NOMINAL
EFFECTIVE LENGTH0.642 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5315 — Nails, Machine Keys, and Pins
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5315-00-000-1037 5315-00-000-1067 5315-00-000-1245 5315-00-000-1372 5315-00-000-1412 5315-00-001-1571 5315-00-001-1572 5315-00-001-1602
SUBSTITUTES & CROSS-REFERENCES 1
K3299Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 266697R1?
266697R1 is a PIN,GROOVED,HEADED.
What parts can replace 266697R1?
There is 1 known substitute for 266697R1: K3299. Substitute compatibility should be verified for your specific system.
What is the NSN for 266697R1?
266697R1 is cataloged in the U.S. Government catalog under NSN 5315-00-276-4356. 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.