Thread Information

MINIATURE NUMBER BASIC THREAD DATA

SIZE THREADS PER INCH PITCH HELIX ANGLE THREAD DEPTH O.D. P.D M.D
0000-160 160 .00625" 6° 43" .00406" .0210" .0169" .0128"
000-120 120 .00833" 5° 18" .00541" .0340" .0286" .0232"
00-90 90 .01111" 5° 5" .00722" .0470" .0398" .0326"
0-80 80 .01250" 4° 23" .00812" .0600" .0159" .0438"
1-72 72 .01389" 3° 57" .00902" .0730" .0640" .0550"
2-56 56 .01786" 4° 22" .01160" .0860" .0744" .0628"

MINIATURE NUMBER SCREWS AND NUTS THREAD LIMITS

NOTE: Minor dia. of nuts is omitted as it is determine by the thread percentage required

NUMBERING SYSTEM FOR MINIATURE SCREWS, NUTS AND WASHERS

A convenient numbering system containing all information for telephone, fax, email, orders and correspondence.
1. H = Hex  R = Round  F = Flat  FF = Flat Fillister  P = Oval Fillister  N = Hex Nuts  W = Round Flat Washers
2. B = Brass  CE = #303 Stainless Steel, passivated  CK = #416 Stainless Steel, Heat Treated, passivated
3. NP = Bright Nickel  AG = Silver Matt Finish  AB = Silver Bright Finish  AU = Yellow Gold  SN = Tin Matt Finish  SB = Tin Bright Finish
* On Self Tapping Screws Threads Per Inch omitted (e.g. 00-90 machine screw- 0090, 00 Self Tapping Screws- 00) TPI also ommitted on washers
** Length ommitted on nuts and washers

MATERIAL SPECIFICATIONS


HEAD DIMENSIONS OF MINIATURE NUMBER SCREWS AND NUTS

Bolts
HEAD Size     00-112      
HEAD Size     00-96   1-64 2-64
HEAD Size 0000-160 000-120 00-90 0-80 1-72 2-56
HEAD Body dia. (D) .021 .034 .047 .060 .073 .086
HEX Hd. Dia. (across flats (A) 3/64" 5/64" 5/64" 3/32" 7/64" 1/8"
HEX Head Height (H) .025 .033 .042 .042 .055 .064
ROUND Head Dia. (A) .038 .059 .085 .106 .130 .154
ROUND Head Height (H) .019 .028 .041 .047 .055 .065
ROUND Slot Width .006 .010 .013 .019 .022 .028
ROUND Slot Depth .010 .015 .022 .032 .037 .042
FLAT Head Dia. (A) .040 .061 .089 .108 .136 .164
FLAT

Head Height (H)

(normal)

 .011 .016 .024 .035 .043 .051
FLAT Slot Width .006 .009 .013 .019 .022 .028
FLAT Slot Depth .005 .007 .010 .013 .016 .019
OVAL FILL Head Dia. (A) .035 .056 .078 .091 .111 .132
OVAL FILL Head height FE .019 .031 .043 .051 .062 .073
OVAL FILL Slot Width .006 .009 .013 .019 .022 .027
OVAL FILL Slot Depth .009 .014 .019 .022 .025 .029
NUT Across Flats (A) 3/64" 5/64" 5/64" 3/32" 7/64" 1/8"
NUT Thickness (H) .025 .033 .040 .048 .063 .075

MORRIS MANUFACTURING SPECIFICATIONS

THREADS: Complete within two from head unless otherwise specified. Any unthreaded body to be no smaller than minimum pitch diameter or larger than maximum major diameter of thread.

CHAMFER: 45° x 1/2-1 thread on end of threads (may not be measurable depending on how thread is started.)

HEAD BEARING SURFACE: At right angles to body within 2°. On flat and oval, axes of head and body parallel within 2°.

CONCENTRICITY: Heads are concentric within 2% of maximum head diameter or .001" whichever is greater.

FILLET RADIUS: (under head): Not to exceed half the pitch except conical which shall not exceed twice the pitch.

LENGTH: + .005" unless otherwise specified.

SLOT CONCAVITY: Not to exceed 3% of mean head diameter. Slot location within .0015" (.001" on 0000-160).

SLOT DEPTH: The perpendicular distance from bottom of a slot at head circumference to top of head on all numbered series and on UNM flat heads. The standard for all other UNM heads is the distance from the bottom of the slot to the bearing surface of the head.