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Nissan Engineering Section (N.E.S.) uses a six-digit Part Number format for bolts and screws and other small hardware. It uses this format:
Kind + dimensions (dd) + length (LL)
Kind
1- Bolts
- 11ddLL: Hexagon bolt, Low carbon steel
- 12ddLL: Hexagon bolt, Medium carbon steel
- 13ddLL: Hexagon bolt, Alloy steel
- 17dLLL: Carriage bolt, Round head
- 18dLLL: Carriage bolt, Flat head
- 19dLLL: Carriage bolt, Step
2- Studs
- 21ddLL: Stud, Low carbon steel (for cast iron)
- 22ddLL: Stud, Medium carbon steel (for cast iron)
- 23ddLL: Stud, Low carbon steel (for light alloy)
- 24ddLL: Stud, Medium carbon steel (for light alloy)
3- Machine Screws
- 31ddLL: Machine screw, Pan head
- 32ddLL: Machine screw, Flat head
- 33ddLL: Machine screw, Oval head
- 34ddLL: Machine screw, Truss head
- 35ddLL: Machine screw, Blind head
- 36ddLL: Machine screw, Hexagon head
5- Other Screws
- 51ddLL: Tapping screw, Pan head
- 52ddLL: Tapping screw, Flat head
- 53ddLL: Tapping screw, Oval head
- 54ddLL: Tapping screw, Truss head
- 57dLL: Wood screw, Round head
- 58dLL: Wood screw, Flat countersunk head
- 59dLL: Wood screw, Oval head
6- Rivets
- 61ddLL: Rivet, Round head
- 62ddLL: Rivet, Flat countersunk head
- 63ddLL: Rivet, Flat head
- 66ddLL: Rivet, Tubular flat head
- 67ddLL: Rivet, Tubular flat countersunk head
- 68ddLL: Rivet, Split oval head
911- Hex Nuts
- 9111dd: Hexagon nut, low carbon steel
- 9112dd: Hexagon nut, medium carbon steel
- 9113dd: Hexagon nut, Low, low carbon steel
- 9115dd: Hexagon nut, High, low carbon steel
- 9116dd: Hexagon nut, High, medium carbon steel
- 9117dd: Hexagon nut, Recess, high, low carbon steel
- 9118dd: Hexagon nut, Recess, high, medium carbon steel
- 9119dd: Hexagon nut, Recess, low, low carbon steel
- 9110dd: Hexagon nut, Recess, low, high carbon steel
912- Lock Nuts
Self-locking nut (stopper nut)
- 9123dd: Self-locking hexagon nut, N, low carbon steel
- 9124dd: Self-locking hexagon nut, N, medium carbon steel
- 9125dd: Self-locking hexagon nut, low, low carbon steel
- 9126dd: Self-locking hexagon nut, low, medium carbon steel
913- Square & Wing Nuts
- 9131dd: Nut, Square
- 9134dd: Nut, Wing (forged)
- 9135dd: Nut, Wing (sheet)
915- Washers
- 9151dd: Washer, Sring lock medium
- 9152dd: Washer, Sring lock thick
- 9154dd: Washer, Plain standard
- 9155dd: Washer, Plain large
- 9158dd: Washer, Finish
916- Tooth-lock Washers
Tooth Lock washer (shakeproof)
- 9161dd: Washer, toothed inside ratchet (outside dia. msall)
- 9162dd: Washer, toothed inside ratchet (outside dia. large)
- 9163dd: Washer, toothed outside ratchet
- 9164dd: Washer, toothed 80° countersunk
- 9165dd: Washer, toothed 90° countersunk
- 9168dd: Washer, toothed both side ratchet
917- Nut Retainers
- 9171dd: Nut retainer, Both shanks round hole
- 9172dd: Nut retainer, One shank round hole
- 9173dd: Nut retainer, Both shanks long hole
- 9174dd: Nut retainer, One shank long hole
92- Pin & Key
- 920dLL: Pin & key
- 1 Cotter pin
- 6 Semicircular key
- 8 Parallel key
931- Thread Plugs
- 9311dd: Plug, threaded, square head taper thread
- 9312dd: Plug, threaded, square hole taper thread
- 9312dd: Plug, threaded, recessed taper thread
- 9313dd: Plug, threaded, hex head taper thread
- 9314dd: Plug, threaded, hex head parallel thread
932- Grease Nipples
- 9321dd: Grease nipple, Straight
- 9322dd: Grease nipple, 67.5°
- 9323dd: Grease nipple, 90°
94- Electric Parts
- 94*1dd: Electric parts
95- Rubber Parts
- 95*1dd: Rubber Grommet
Dimension Digits
Distinction by alias dimension of diameter and width. Each number may be either a size, inch dimension or metric dimension.
- 01: #1, 1/16", 1mm
- 02: #2, , 2mm
- 03: #3, 3/32", 3mm
- 04: #4, 7/64", 4mm
- 05: #5, 1/8", 5mm
- 06: #6, n/64", 6mm
- 08: #8, 5/32", 8mm
- 09: ,,9m
- 10: #10, 3/16", 10mm
- 12: #12, 7/32", 12mm
- 13: ,, 13mm
- 14: #14, 1/4", 14mm
- 15: ,5/16", 15mm
- 16: #16, 3/8", 16mm
- 17: ,7/16", 17mm
- 18: ,1/2", 18mm
- 19:, 9/16",
- 20:, 5/8", 20mm
- 22: ,3/4",
- 24: ,7/8",
- 26: ,1",
- 28: ,1-5/8",
Also add 30, 60, or 50 to above.
Length Digits
LL as shown above:
- 07: 1/4 inch
- 10: 3/8
- 13: 1/2
- 16: 5/8
- 19: 3/4
- 22: 7/8
- 26: 1 inch
- 28: 1-1/8
- 32: 1-1/4
- 35: 1-3/8
- 38: 1-1/2
- 41: 1-5/8
- 44: 1-3/4
- 48: 1-7/8
- 51: 2 inch
- 54: 2-1/8
- 57: 2-1/4
- 64: 2-1/2
- 70: 2-3/4
- 76: 3 inch
Suffix
For parts that have surface finishing or cotter pin hole, symbols showing these proceedings are added at the end of the part number.
Two digits mean it has a cotter pin hole. Single digit: No cotter pin hole.
- 1: Zinc cadmium coated
- 2: Chrome coated
- 3: Copper coated
- 4: Phosphoric acid coated
- 5: Brass
- 6: Copper
With Cotter Pin Hole
- 10: surface not processed
- 11: Zinc cadmium coated
- 21: Chrome coated
- 31: Copper coated
- 41: Phosphoric acid coated
- 51: Brass
- 61: Copper